The DH-ER1C is a 1" chrome extension rod from Interlogix that is made as an electromagnetic fire door holder accessory to be used when required within an application. The DH-ER1C extension rod comes with a quality heavy duty construction, a lightweight stylish size, an affordable and cost effective price, as well as easy handling. The DH-ER1C extension rod extends 1" and is suitable for use in most applications.